To provide a resin composition for laser engraving having high engraving sensitivity when subjected to laser engraving, and a relief printing plate original plate for the laser engraving of high engraving sensitivity and enabling direct preparation by the laser engraving.
This resin composition for the laser engraving contains (A) a binder polymer of at least one kind selected from the group comprising a vinyl polymer, a polyester, a ployamide, a polyurethane and a polyurea, and (B) a compound satisfying the condition where a temperature bringing 10% of weight reduction rate when conducting thermogravimetric analysis (TGA) of temperature-elevating a mixture obtained by adding 10 mass% to the (A) binder polymer at 20C/min. of temperature elevation speed from an ambient temperature, under a nitrogen atmosphere, is lower by 5-300C compared with that of the single binder, and the relief printing plate original plate for the laser engraving is prepared using the resin composition.
SUGAZAKI ATSUSHI
Kato Kazunori
Katsuichi Nishimoto
Hiroshi Fukuda
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